Sigma lenses and Nikon D200: upgrade needed

Nikon D200Sigma just announced that customers that use their lenses on the Nikon D200 should upgrade some of their Sigma lenses if they are part of the list below:

Fixed focal lenses
28mm F1.8 DG ASPHERICAL RF
Zooms
20-40mm F2.8 EX DG ASPHERICAL
24-70mm F2.8 EX DG MACRO
24-70mm F2.8 EX ASPHERICAL DF
28-70mm F2.8 EX DG
28-105mm F2.8-4 DG
28-105mm F2.8-4 ASPHERICAL

The bad news is that these lenses may produce a wrong exposure. But the good news is that the upgrade is free from Sigma.